Open AccessStudy on Pollutant Emission in a Natural Draft Dry Cooling tower with Flue Gas Injection based on LES
Author(s) -
Ying Zhou,
Haihong Xu,
Zhen Xu,
Li Ding
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1600/1/012011
Subject(s) - reynolds averaged navier–stokes equations , pollutant , environmental science , large eddy simulation , cooling tower , computational fluid dynamics , flue gas , mechanics , hull , meteorology , turbulence , chemistry , water cooling , engineering , marine engineering , physics , waste management , aerospace engineering , organic chemistry
This study investigated the Computational Fluid Dynamics (CFD) simulation of pollutant emission in a natural draft dry cooling tower (NDDCT) with flue gas injection. In order to predict the diffusion and distribution characteristics of the pollutant more accurately, Large Eddy Simulation (LES) was applied to predict the flow field and pollutant concentration field and compared with Reynolds Average Navier-Stokes (RANS). The relationship between pollutant concentration pulsation and velocity pulsation is emphatically analyzed. The results show that the maximum value of LES is about 43 times that of RANS for the prediction of pollutant concentration in the inner shell of cooling tower. Compared with RANS, LES can simulate flow field pulsation with a smaller scale and higher frequency.